A Dinosaur-Bone-and-Diamond Choker Worth $57,000

Understated but unusual, Monique Pean’s collar necklace is a study in rarity — flanking either side of a 2.86-carat diamond are geometric crests made of fossilized dinosaur bone and woolly mammoth tusks, each edged with tiny diamonds. What we love the most are the graphic slices of black and white lepidolite, and a hazy blue stone that makes it all the more otherworldly.